From b5c5693d22cda0db33d01c6350d790b59a98c92c Mon Sep 17 00:00:00 2001
From: John Snow <jsnow@redhat.com>
Date: Wed, 18 Jul 2018 22:54:42 +0200
Subject: [PATCH 57/89] block/dirty-bitmap: add bdrv_enable_dirty_bitmap_locked

RH-Author: John Snow <jsnow@redhat.com>
Message-id: <20180718225511.14878-7-jsnow@redhat.com>
Patchwork-id: 81405
O-Subject: [RHEL-7.6 qemu-kvm-rhev PATCH 06/35] block/dirty-bitmap: add bdrv_enable_dirty_bitmap_locked
Bugzilla: 1207657
RH-Acked-by: Eric Blake <eblake@redhat.com>
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
RH-Acked-by: Fam Zheng <famz@redhat.com>

From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

Add _locked version of bdrv_enable_dirty_bitmap, to fix dirty bitmap
migration in the following patch.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-id: 20180625165745.25259-2-vsementsov@virtuozzo.com
Signed-off-by: John Snow <jsnow@redhat.com>
(cherry picked from commit 92bcea40d3aac62853e60426bd109b748d4d1cd2)
Signed-off-by: John Snow <jsnow@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 block/dirty-bitmap.c         | 9 +++++++--
 include/block/dirty-bitmap.h | 1 +
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 4159d39..4d6ae8b 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -250,6 +250,12 @@ int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
     return 0;
 }
 
+void bdrv_enable_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap)
+{
+    assert(!bdrv_dirty_bitmap_frozen(bitmap));
+    bitmap->disabled = false;
+}
+
 /* Called with BQL taken. */
 void bdrv_dirty_bitmap_enable_successor(BdrvDirtyBitmap *bitmap)
 {
@@ -453,8 +459,7 @@ void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
 {
     bdrv_dirty_bitmap_lock(bitmap);
-    assert(!bdrv_dirty_bitmap_frozen(bitmap));
-    bitmap->disabled = false;
+    bdrv_enable_dirty_bitmap_locked(bitmap);
     bdrv_dirty_bitmap_unlock(bitmap);
 }
 
diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h
index 1e14743..af9ba3c 100644
--- a/include/block/dirty-bitmap.h
+++ b/include/block/dirty-bitmap.h
@@ -33,6 +33,7 @@ void bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs,
                                          Error **errp);
 void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
+void bdrv_enable_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap);
 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
 uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs);
 uint32_t bdrv_dirty_bitmap_granularity(const BdrvDirtyBitmap *bitmap);
-- 
1.8.3.1